Machine for cutting micanite or the like.



PATENTED FEB. 28, 1905.

E. G. KASTENHUBER.

MACHINE FOR CUTTING MIGANITE OR THE LIKE.

APPLICATION FILED 00122, 1902.

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PATENTED FEB. 28; 1905.

' E. G. KASTBNHUBBR.

MACHINE FOR CUTTING MIGANITE OR THE LIKE.

APPLIOATION FILED OCT. 22, 1902.

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UNTTED STATES Patented February 28, 1905.

PATENT EETcEo EDWIN Gr. KASTENHUBER, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

MACHINE FOR CUTTING IVIICANITE OR THE LIKE.

SPECIFICATION forming oart of Letters Patent No. 783,438, dated February 28, 1905.

Application filed October 22, 1902. Serial No. 128,282.

To all whom, it may concern.-

Be it known that LEDWIN G. KAsTENHUBER, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Machines for Cutting Mi oanite or the Like, of which the following is a specification.

My invention relates to machines for cutting irregular shapes from sheet insulation such as mica, micanite, and similar materials and has for its object to provide a simple com- I pact machine which is adapted to operate upon sheets of material of large size and of various thicknesses.

The invention will be more readily understood by reference to the accompanying drawings, forming a part of this specification, in which Figure 1 is a side elevation, with parts broken away, of a cutting-machine embodying one form of my invention. Fig. 2 is a front end elevation of the same. Fig. 3 is a vertical section through the work-table and its vertical adjusting means. Fig. 4 is a longitudinal section taken on line 4: 4 of Fig. 3. Fig. 5 is a perspective of the presser-foot; and Figs. 6 and? are side andend views, respectively, of the cutter-blade with its securing means shown in section.

The main frame A is U-shaped and has an extended base part 1, adapted to rest upon and be connected to a suitable pedestal. The rear end of the frame is provided with internal bearings for the vertical drive-shaft 2 and the upper horizontal arm of the frame is provided with internal bearings for the horizontal drive-shaft 3. The power is transmitted from shaft 2 to the horizontal shaft 3 by means of bevel-gears4 and 5, and in order to permit access to be had thereto the upper rear end of the main frame A is cut away and the aperture closed by the angle-plate 6.

The frame A carries at its upper front end the head 7, which is pivoted thereto about a vertical axis by means of stub-shafts 8 8, journaled in lugs extending from the end of the frame and screw threaded into corresponding lugs at the rear side of the head 7 The horizontal drive-shaft 3 is provided with 5 a universal joint 9 in line of the vertical axis about which the head 7 is pivoted, so that the head may be freely oscillated without interfering with the transmission of power to the operative parts carried thereby. The shaft 3 terminates at its front end ina crank-plate 10, carryingashort crank-pin 11. The crank-pin 11 engages in a transverse slot 12 in the reciprocating plunger 13, adapted to travel in guidebearings 14 14 in the front side of the head and is held therein by a face-plate 15, which is securedin position by screws passing there' through and engaging tapped holes in the head 7. The head 7 is provided at one side with lugs or projections 16 and 17. The upper lug 16 is provided with a round hole for the reception of the adjusting-nut 18, and the lower lug 17 is provided with a square hole for the reception of the adjustable supporting-bar 19 for the presser-foot. The supporting-bar 19 is screw-threaded at its upper end, and throughout the remaining portion of its length it is square in cross-section, being adapted to travel lengthwise in the square hole in the lower lug 17.- The lower end of supporting-bar 19 is provided with a right-angled offset or projection 20, to which the presser-foot 21 is connected by a sliding joint at 22. Between the projection 20 and the top of the presser-foot is located a spring 23, which acts to force the presser-foot 21 upon the work.

The reciprocating plunger 13 is slotted at its lower end and provided with a clamping-bolt 24, as shown in Figs. 6 and 7, adapted to bind the shank of the cutting-blade 25 securely thereto. The cutting blade 25 is parallelsided and has its lower end cut diagonally and ground to an irregular or sinuous edge. The presser-foot 21 is provided with a slot 26, through which the cutting-blade is adapted to reciprocate freely and be at the same time steadied thereby. The lower part of the presser-foot 21 is extended forward considerably beyond the front of the cutting-blade 25 and turned up away from the table forming guide horns or projections 27. The upper part of the presser-foot is also extended forward to the front edge of the cutting-blade,

forming guard projections 28, which serve to protect the hands of the operator from coming in contact with the cutting-blade. Near the rear end of the under side of the presserfoot 21 is connected a steel blade 29, which projects through a slot in the work-table and serves as a follower-guide for the work and also to transmit the oscillatory motion of the table 30 to the cutter-head. The work-table 30 is carried at the upper end of a hollow shaft 31, mounted in a bearing B in the front end of the main frame A, and thrusts against a cylindrical bead 32, journaled in a lower part C of the frame A immediately beneath the shaft 31. The bead 32 has a cylindrical projection 33, jonrnaled in the hollow shaft 31, and has near its lower end atransverse slot 34: for the reception of the vertically-adjustable lever 35. The lever 35 is fulcrumed at 36 in lugs 37, projecting at right angles from the lower front end of the main frame A. The lever is provided with a spring-pressed latch 38, connected by a rod 39 to a hand-release 40, pivoted near the end of the lever. engage a segmental rack 41, secured to one of the lugs 37, and lock the lever in adjusted position. When the material operated upon is relatively thick, the work-table 30 may be readily lowered by adjustment of the lever 35. The parts are so proportioned that when the table is lowered to its limit only the point of the cutting-blade 25 will pass below its upper surface, so that the feed of the work beneath the cutting-blade will be automatically regulated, according to'the thickness of the material, and the machine will be protected from undue strain.

In order to oscillate the work-table 30 and the cutter-head 7 so as to vary the direction of the cutting-blade 25 when it is impractica- The latch 38 is adapted toble to move the work without its engaging some portion of the main frame A, I secure a projection 42 near the lower end of the hollow shaft 31; to which is fulcrumed a springpressed bell-crank 13, the upper end of which is adapted to engage a segmental rack 44, secured to the front end of the main frame A, so that by disengaging the bell-crank from the rack 44 the table 30 and the head 7 may be turned through the desired angle and locked in adjusted position.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination of a main frame, acutter-head pivoted thereon, a work-table pivoted upon said frame, and a presser-foot connected to said head and to said table.

2. The combination of a main frame, a cutter-head pivoted thereon, a horizontally and vertically adjustable work-table, and means for adjusting said head in unison with the horizontal adjustment of said table.

3. The combination of a cutter-head, a slotted work-table, and a presser-foot yieldingly connected to said cutter-head and provided with a follower-guide extending into the slot of said table.

1. The combination of a cutter-head and a work-table adjustable toward and from each other, a cutter-blade carried by said head and having a diagonal cutting edge, and a guidefollower connected to said head and engaging said table.

In witness whereof I have hereunto set my hand this 20th day of October, 1902.

EDWIN e. KASTENHUBER.

Witnesses:

BENJAMIN B. HULL, HELEN ORFORD. 

